Hello,

I have visited your website. To achieve this you need to create a separate menu for the mobile categories then you need to add the sub-items to the specific menu items.

Then you need to add the specific menu as categories menu from Woodmart >> Header Builder >> Edit Header >> Mobile Header on the right top.

Screenshot for Clarification: https://ibb.co/JcnxqNZ

Regard’s.
Xtemos Studio.